Public Access
jaap-jan
3f419cb19b
The hosts screen draws two grids, one above the other, and each is a ListBox with a selection of its own. Nothing joined them, so a group card and a host card could be lit at the same moment — two chosen things, under two pairs of buttons of which only one would act on whichever the eye had settled on. Both grids mark a selection the same way, so there was nothing on screen to say which of the two the next press belonged to. They share one mark now. Selecting a host clears the group and selecting a group clears the host, and that second one takes the detail pane down with it: a pane about one machine cannot go on standing beside a marked group, because nothing on it would be about what is selected. Losing a selection deliberately clears nothing. A null arrives whenever either list is rebuilt — every keystroke in the filter box and every background sync — and treating that as somebody deselecting would take the mark off a group card because a search emptied the grid beneath it. The reload needed the same guard for the same reason. It falls back to the first host when nothing is selected, which is what puts a target under CONNECT on a fresh unlock; with one mark between the two grids that fallback would have unselected a group nobody had touched, once a minute. It is skipped while a group holds the selection, and it moved into a method of its own because the comment saying why pushed ReloadHostsAsync past sixty lines. One consequence needed handling rather than accepting. The phone's only route into the group editor is a button on a heading in the host list, and it worked by selecting the group first — which under this rule takes the highlight off the machine somebody was about to connect to, on a screen that draws no group cards to say where it has gone. EditGroup takes the group as an argument now: the heading passes its own row, and the desktop's button beside the cards passes nothing and still means "the card that is selected". What the tests hold is the half that lives in the controls. Clearing the property has to reach the list that is drawing the card, and a selection nulled in the view model while the card stays highlighted is the exact failure this is about — so the rule is driven on the real screen, in both directions, against the ListBoxes' own SelectedItem. The desktop's EDIT is pressed through its binding for the same kind of reason: a command refusing the button's empty parameter would be a button that never fires, and nothing about the markup would say so.